The Southwest Slope and Northwest Face are class 4.
Most of this route is class 2, with about 100 feet of easy class 4 just below
the summit. Leave the Piute Pass Trail at the pass, heading NNE towards
Humphreys Lakes and Mt. Humphreys. Pass the highest of the lakes on the east
side, gaining Mt. Humphreys' southwest slope. Climb the scree slopes until
a wide gully is attained that slices left and up towards the conspicuous notch
northwest of the summit. Follow the gully to the ridge. A class 3 scramble
leads up an ever-steepening trough until a vertical wall forces one to the
right on narrow ledges (most parties us a rope on this section). A second
steep (but short) class 4 section is encountered above this on the arete
leading to easier ground just below the summit.